Dr. David Samadi: Too Many Multivitamins 'May Not Be Good for You'

Multivitamins work, but not all people need them, and in fact some of the ingredients in them could cause problems, according to Dr. David Samadi, chairman of urology and chief of robotic surgery at Lenox Hill Hospital.

"For most of us, where you have a balanced diet … your nutrition's already there," Samadi told "The Steve Malzberg Show" on Newsmax TV.

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"Multivitamins [are] not going to really help you because you already got it from the appropriate diet."

He said, however, those frenzied, eat-on-the-run lifestyles, will benefit.

"The problem with this country is that we don't have a balanced diet … We don't have enough breakfast, we don't eat the right food, we may eat a lot of fatty good and not get enough vegetables, and that's when we recommend people take multivitamins," he said.

But care must be taken in taking any vitamin, he emphasizes.

"Sometimes such vitamins such as vitamin E, a lot of them we're finding out that they can cause prostate cancer. We are finding out that too much fish oil may not be good for you," he said.

So I encourage you to take your salmon, your tuna, your legumes, and all of those are actually healthy. Nuts [are] great for you. But too much of it may have a reverse effect. And that's another thing."

Multivitamins work, but not all people need them, and in fact some of the ingredients in them could cause problems, according to Dr. David Samadi, chairman of urology and chief of robotic surgery at Lenox Hill Hospital.